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Related Experiment Videos

Trunk muscle activation patterns during walking at different speeds.

Christoph Anders1, Heiko Wagner, Christian Puta

  • 1Department for Trauma-, Hand- and Reconstructive Surgery, Division for Motor Research, Pathophysiology and Biomechanics, Friedrich-Schiller-University Jena, D-07740 Jena, Germany. cand@moto.uni-jena.de <cand@moto.uni-jena.de>

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
|March 7, 2006
PubMed
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Trunk muscle activation during walking changes with speed, with increased muscle activity at faster paces. However, some back muscles show consistent activation patterns across moderate speeds.

Area of Science:

  • Biomechanics
  • Human Movement Science
  • Kinesiology

Background:

  • Trunk muscle activation during gait is understudied.
  • Existing literature lacks systematic analysis of walking speed's influence on trunk muscles.

Purpose of the Study:

  • To investigate trunk muscle activation patterns across various walking speeds.
  • To analyze how gait speed modulates trunk muscle activity.

Main Methods:

  • Surface electromyography (SEMG) was used to measure activation in five trunk muscles.
  • Fifteen healthy men walked on a treadmill at speeds from 2 to 6 km/h.
  • Data were normalized to stride time, and stride characteristics like mean amplitude and variation coefficient were extracted.

Main Results:

Related Experiment Videos

  • Trunk muscle activation patterns remained phase-dependent but generally increased in mean amplitude with walking speed.
  • Phasic activation increased with speed, though back muscles showed less change between 4-6 km/h.
  • Minimum activation levels varied by muscle and speed, with some decreasing continuously and others reaching a minimum at 4 km/h.

Conclusions:

  • Trunk muscle activation is modulated by walking speed within the tested range.
  • While activation generally increases with speed, specific patterns suggest speed-dependent adjustments rather than uniform changes.
  • Findings highlight the dynamic nature of trunk muscle engagement during locomotion.